From owner-wx-tropl@LISTSERV.ILLINOIS.EDU Tue Dec 28 20:31:43 2010 Received: from vacuum.cso.uiuc.edu (vacuum.cso.uiuc.edu [128.174.5.113]) by cozumel.ust.hk (8.13.8/8.13.8) with ESMTP id oBSCVguD013096 for ; Tue, 28 Dec 2010 20:31:43 +0800 Received: from vacuum.cso.uiuc.edu (vacuum.cso.uiuc.edu [128.174.5.113]) by vacuum.cso.uiuc.edu (8.14.2/8.14.2) with ESMTP id oBRKRJHO000588; Tue, 28 Dec 2010 06:30:19 -0600 (CST) Received: by LISTSERV.ILLINOIS.EDU (LISTSERV-TCP/IP release 14.5) with spool id 4896650 for WX-TROPL@LISTSERV.ILLINOIS.EDU; Tue, 28 Dec 2010 06:30:18 -0600 Received: from relay10.cites.uiuc.edu (relay10.cites.uiuc.edu [128.174.196.10]) by vacuum.cso.uiuc.edu (8.14.2/8.14.2) with ESMTP id oBSCUI1Q011636 for ; Tue, 28 Dec 2010 06:30:18 -0600 (CST) Received: from weather3.admin.niu.edu (weather3.admin.niu.edu [131.156.8.48]) by relay10.cites.uiuc.edu (8.14.4/8.14.2) with ESMTP id oBSCUCMH008799 for ; Tue, 28 Dec 2010 06:30:18 -0600 (CST) Received: by weather3.admin.niu.edu (Postfix, from userid 501) id EADE73FE0004; Tue, 28 Dec 2010 06:30:11 -0600 (CST) X-Proofpoint-Spam-Reason: safe Message-ID: <20101228123011.EADE73FE0004@weather3.admin.niu.edu> Date: Tue, 28 Dec 2010 06:30:11 -0600 Reply-To: wxmaster@COX.NET Sender: WX-TROPL Tropical Storm and Hurricane WX products From: LDM Weather Subject: Central Pacific: Satellite Interpretation Message To: WX-TROPL@LISTSERV.ILLINOIS.EDU Precedence: list 124 ATHW40 PHFO 281230 SIMHI HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI 1230 UTC TUE DEC 28 2010 BASED ON DATA THROUGH 1200 UTC DECEMBER 28 2010 AN UPPER LEVEL TROUGH REMAINS EVIDENT ON THE WATER VAPOR SATELLITE CHANNEL AROUND 800 MILES WEST OF KAUAI. THE TROUGH EXTENDS NORTH TO SOUTH ALONG 174W. WINDS ALOFT EAST OF THE TROUGH ARE DIVERGENT... COMING OUT OF THE SOUTHWEST OVER KAUAI AND OAHU...AND OUT OF THE WEST-SOUTHWEST OVER THE REST OF THE STATE. DIFFLUENT FLOW AT UPPER LEVELS OF THE ATMOSPHERE AID AND ABET THE FORMATION OF THE SHOWERS AND THUNDERSTORMS DISCUSSED BELOW. OVER THE LAST 12 HOURS...THUNDERSTORMS HAVE DECREASED IN NUMBER SOUTH AND SOUTHWEST OF THE STATE. AS EARLY AS 6 HOURS AGO...THERE WERE NUMEROUS THUNDERSTORMS OVER AND JUST SOUTH OF OAHU. AT THIS WRITING...MOST OF THE THUNDERSTORMS NEAR THE STATE HAVE DISSIPATED WHILE THOSE FARTHER TO THE SOUTH HAVE INCREASED IN NUMBER AND INTENSITY. MOST OF THE THUNDERSTORMS ARE NOW WITHIN AN AREA BOUNDED BY 20N163W TO 20N158W TO 09N150W TO 09N157W TO 20N163W...OR FROM ABOUT 100 MILES SOUTH OF KAUAI AND OAHU TO ABOUT 650 MILES SOUTH OF THE BIG ISLAND. THE HEAVIEST THUNDERSTORMS ARE THE FARTHEST AWAY FROM THE ISLANDS BETWEEN 10N AND 15N. CLOUD TOPS DOWN THERE ARE UP TO 50 TO 55 THOUSAND FEET. THE ISOLATED THUNDERSTORMS CLOSER TO THE ISLANDS ARE UP TO 45 THOUSAND FEET JUST SOUTH OF 20N. OVERCAST HIGH CLOUDS BLOWN OFF THE TOPS OF THE THUNDERSTORMS STILL OBSCURE THE CLOUDS BELOW...BUT NEXRAD CONTINUES TO SHOW THAT THERE ARE MERGING CLOUD LAYERS UP TO 3O THOUSAND FEET OVER THE STATE. THIS IS IN RELATIVELY GOOD AGREEMENT WITH SATELLITE-DERIVED CLOUD TOPS. ALSO EAST OF THE TROUGH ALOFT IS A SOUTHWEST TO NORTHEAST JETSTREAM RUNNING THROUGH 30N170W...OR ABOUT 800 MILES NORTHWEST OF KAUAI. THE JETSTREAM IS CARRYING HIGH CLOUDS FROM THE THUNDERSTORMS ALL THE WAY TO NORTHERN CALIFORNIA...WASHINGTON...AND OREGON. THE AREA AS A WHOLE...INCLUDING ALL OF THE LAYERED CLOUDS AND THE THUNDERSTORMS FIT WITHIN AN AREA FROM 09N TO 30N BETWEEN 150W AND 174W. THE AREA IS MOVING SLOWLY TO THE EAST AS IS THE UPPER TROUGH WEST OF THE STATE. $$ CRAIG +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from WX-TROPL send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with "unsub wx-tropl" in the body of your message. For help with WX-TROPL write to cnovy@cox.net. For more information on tropical weather products, see the NHC Homepage at http://www.nhc.noaa.gov.